SYNOPSIS

DESCRIPTION

fgetc() reads the next character from stream and returns it as an unsignedchar cast to an
int, or EOF on end of file or error.
getc() is equivalent to fgetc() except that it may be implemented as a macro which
evaluates stream more than once.
getchar() is equivalent to getc(stdin).
fgets() reads in at most one less than size characters from stream and stores them into
the buffer pointed to by s. Reading stops after an EOF or a newline. If a newline is
read, it is stored into the buffer. A terminating null byte ('\0') is stored after the
last character in the buffer.
ungetc() pushes c back to stream, cast to unsignedchar, where it is available for
subsequent read operations. Pushed-back characters will be returned in reverse order;
only one pushback is guaranteed.
Calls to the functions described here can be mixed with each other and with calls to other
input functions from the stdio library for the same input stream.
For nonlocking counterparts, see unlocked_stdio(3).

RETURNVALUE

fgetc(), getc() and getchar() return the character read as an unsignedchar cast to an int
or EOF on end of file or error.
fgets() returns s on success, and NULL on error or when end of file occurs while no
characters have been read.
ungetc() returns c on success, or EOF on error.

CONFORMINGTO

POSIX.1-2001, POSIX.1-2008, C89, C99.
It is not advisable to mix calls to input functions from the stdio library with low-level
calls to read(2) for the file descriptor associated with the input stream; the results
will be undefined and very probably not what you want.

SEEALSO

COLOPHON

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